Perhaps they meet in an alternate universe where their worlds have collided. They start off as rivals, each thinking the other is a threat to their respective missions. But as they learn more about each other, they realize they can achieve more together and form an unbreakable alliance.
One idea could be that they are forced to team up against a common enemy who has the power to manipulate time. Black Widow's espionage skills and Wonder Woman's strength would make for an exciting combination in a race against time to stop the villain.
One idea could be a story where Loki and Black Widow are forced to team up on a mission in a parallel universe. They have to overcome their initial distrust of each other due to their different backgrounds and allegiances.
One idea could be that they team up on a dangerous mission in a post - apocalyptic world. Their different skills, Black Widow's combat and espionage expertise and Quake's seismic powers, would make for an exciting dynamic as they fight off various threats.
Another plot could involve a time - travel scenario. Spiderman and Black Widow get sent back in time to a crucial moment in the history of the Avengers. They have to work together to make sure the events unfold correctly without changing too much of the timeline. Along the way, they discover secrets about their predecessors and how they can apply those lessons to their own lives.
A good plot could be that the world is suddenly hit by a wave of anti - superhero sentiment. Wonder Woman and Superman are two of the main targets. They have to go undercover and live among the humans for a while. During this time, they learn more about the regular people's fears and concerns. They also start to develop a romantic relationship as they rely on each other for support in this difficult situation.
One plot idea could be that Naruto and Wonder Woman are brought together by a powerful villain who is causing chaos in both their worlds. They have to combine their unique skills, Naruto's ninja techniques and Wonder Woman's superpowers, to defeat the villain. Another could be a story where Naruto is accidentally transported to Wonder Woman's universe and he has to learn the ways of this new world while also helping Wonder Woman with a local threat.
A possible plot for spiderman x wonder woman fanfiction is that a group of super - villains from both their rogues' galleries team up. Spider - Man and Wonder Woman are forced to collaborate to take them down. During their adventure, they learn from each other's fighting styles. Spider - Man teaches Wonder Woman some of his acrobatic moves, and she in turn shows him how to better use his strength in combat. Their relationship evolves from reluctant allies to friends and perhaps more as they share their personal stories and values while fighting the bad guys.
One idea could be that they are on a secret mission together. The Winter Soldier's past memories start to resurface during the mission, and Black Widow helps him deal with the confusion and the emotional turmoil. They gradually develop a deeper connection as they rely on each other's skills.
Maybe in the fanfiction, Percy gets transported to Wonder Woman's world. He has to adapt to the new environment while also helping Wonder Woman deal with a political unrest in her kingdom. Since Percy has experience with power struggles in the Greek god world, he offers unique insights. They start to respect and rely on each other more as they face various challenges together.
Ares could be a great antagonist. He might see the union of Black Widow and Wonder Woman as a threat to his plans of chaos and war. His god - like powers would pose a significant challenge to the two heroines.
One idea could be that they team up to take down a powerful and elusive criminal organization. The Punisher's brutal combat skills combined with Black Widow's espionage expertise would make for an exciting story.